Anthropic: Elevated errors for multiple models

Anthropic · anthropic.comImpact: majoridentified2026-09-22 01:35 UTC

Public — what happened

Summary

We are continuing to work to resolve errors affecting some models. At this time, requests to Claude Fable 5 and 5.1 and Mythos 5 and 5.1 have returned to normal success rates. We are working to resolve remaining errors affecting Claude Opus 5, and will provide an additional update shortly.

Timeline

Started — 2026-09-22 00:57 UTC
Last update — 2026-09-22 01:35 UTC
Ongoing at last check.

Source of record: provider status page. Mirrored as reported; times in UTC.

With SquidGrid — where it starts on the route

Independent path health

The status page is the symptom. SquidGrid measures the paths that reach Anthropic against their own baselines — whether the routes carrying your traffic degraded, at which handoff, and who owns that stretch.

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Customers get the live Provider Assessment Report for Anthropic: paths off baseline right now, where on the route conditions change, and its full incident track record.

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Related: Anthropic status & history. SquidGrid is not affiliated with Anthropic.